Spark-plug.



J. M. WALTON.

-SPARK PLUG.

APPLICATION FILED OCT. 13, 1913.

1,132,81 1. Patented Mar.23,1915.

I HIILIWH" wmmmnmlmmlmmiM? IIHIH lllllllllllllllllllmllH1 AttorneysJenn" M. Warren, or new ORLEANS, Louisiana.

SPARK-PLUG. i 1' niaaaia To all whom it may concern:

Be it known that I,.JHN M. WALTON, a citizen of the United States,residingv at New Orleans, in the parish of Orleans and State ofLouisianayhave invented a new and useful Spark-Plug, of which thefollowing is a specification;

The present invention relates to improvements in spark plugs, one objectof the invention, being the provision of cooperating electrodes, theconstruction and combination of which provide for the dripping of the Ilubricating oil which may be carried by the Fig. 2 is a vertical centralsectional viewv carbureted air thereupon, so that the spark ing pointswill not be insulated by the lubricant, and by means of which theterminals at all times will be free of lubricant and to a greatextent'be relieved of the objectionable feature of carbonizing.

A further object of the present invention, is the provision of anadjustable central electrode, by means of which the spark gap may beregulated to an exactness, said adjustable electrode being provided witha plurality of points, whereby desired sparkmg 1S assured, even shouldsome of the .points be insulated by lubricant or become carbonized.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement'of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of ,the invention herein disclosed can beqmade within thescope of what is claimed without departing from the spirit of theinvention.

In the drawings-Figure 1 is a side elevation of a spark plug constructedaccording to andembodying the present invention.

.therethrough. Fig. 3 is a bottom plan view of the disk oi theadjustable electrode. Fig. 4 is a side elevation thereof.

Referring to the drawings, the numeral 1 designates the metal shellwhich is adapt- .ed to be screwed into the cylinder'of the explosionengine, its electrode or sparking portion 2 being in the form of atruncated cone and ta cred, as clearly illustrated, so

that any lu ricant'adhering thereto, will. I be directed downwardly andaway from the 1 E spark plug. Q

manner, is the sleeve or insulating member Fitted within the member 1',in the usual I Specification of Letters Patent.

Patented an. as, rare.

Applihation filed October 13, 1913. Serial No. 794,980.

" 3,which is provided with the central bore 4 fhr the reception of thestem '6, the lower.

endof thebore 4 being enlarged as at 5 for the reception of the diskorhead 7 carrled by the stem '6 intermediate of its enlarged andreducedend 8,.said reduced end being disposed to project below thesparking terminal 13 of the truncated conical end 2 of the member 1' andcarry thereupon,

the sparking terminal or disk 9. This disk 9,. as clearly illustrated inFigs. 3 and 4, is

radially cut and the extreme edge of each radial section 10 is bent outof the same plane of the central portion of the disk and relatively toeach other so as to provide the interstices or spaces 11 at theperiphery of.

the disk, the upper face of eachsection- 10 being disposed at an angle,so that any lubricant directedthereon from the terminal'2 will befurther directed between the spaces 11 and thus drain the electrodes ofthe spark plug. The upper points or edges -12 of the disk 9 are disposeddirectly below and in sparking relation to the sparking end 13 of themember2 and thus provide a in the plurality of points on the disk 9,present instance, six being .shown.

Surrounding, the lower end of the enlarged portion of the stem 6 abovethe disk or head 7 within the socket 5, are a plurality of packing andadjusting rings 14 the same being relatively thin, and providing meanswhereby the sparking disk 9 may be adjusted so. that its sparking points12 will be placed at the desired adjustment relatively to the sparkingterminal 13 of the portion 2 of the member 1, these disks 1d regulatingthe spark gap between these parts. F I Disposed upon the upper end ofthe in-- sulating body 3 and surrounding the upper threaded end of thestem 6, is a disk 15, there 7 being disposed upon the stem 6 a pluralityof thin washers or rings 17 which form an auxiliary adjusting means-forthe sparking member 6, a split ring or locking washer 16 surroundingthese washers or rings17, and

the lower reduced end 18 of the upper lock nut 19. Disposed upon theupper end of the stem 6, is the bindin nut 20 for prop erly connectingthe e ectrical thereto.

It will be noted that the disk ,9 is of terminal greater diameter thanthe bore 13', thus causing the periphery thereof to overlap, as it were,the flat sparking rim 13 of the electrode2. By this construction, thepassagel gig . way for gases into the bore 13" "is lefiened,

the disk 9 acting as a bafie plate to prevent such passage that tends toand does clog the bore. By this arrangement lubricant uponthe portion 2is directed upon'the' periphery oi the disk 9 Where 'the explosions blowta or dislodge the same.

What is claimed is:

A spark plug, including a metal bushing havin a reduced frusto-conicalelectrode end, said bushing having a longitudinal bore therethroughterminating in a reduced ioore through the'electrode end to provide areduced circular rim upon the electrode end, a tubular body ofinsulation having an intermediate enlargement, one end or the bodyseating in the enlarged endof the longitudinal bore of the bushing, alocking means for holding the body of insulation in the hushing, a metalstem extending through the tubular body and projecting beyond thefrusto-conical end of the bushing, and a disk electrode riveted upon theextended end of the stem and of greater diameter than the reduced horeof the bushing, the periphery of said disk being provided With aplurality' of radial incisions, and the intermediate segments of thedisk being alternately bent up out of the plane/of the disk: to providea plurality of sparking points and oil it drains;

In testimony that l claim the foregoing as my own, l have heretoaflixedmy signature in the presence of two Witnesses.

JUHN M. WALTQNO Witnesses:

FRANK C. FEG EY, Errin H. FEGLEY;

